Electric battery.



'Be' it known that I, FELIPPE UNITED sTATEs PATENT OFFICE.

FELIPPE SABOIA BANDEIRA DE MELLO, 0F RIO DE JANEIRO, BRAZIL.

' ELECTRIC BATTERY.

No Drawing.

To all whom it mag concern:

SABOIA BAN- DEIRA DE MELLo, a citizen of the United States of Brazil, and resident of Rio de Janeiro, Brazil, have invented certain new and useful Improvements in Electric Batteries, of which the following is a specification.

This invention relates to primary electric batteries.

The leading feature of the invention consists in the employment as a depolarizer, of the protosulfid of copper Cu S.

obtained by the combustion of copper sheets in sulfur vapor away from contact with the air.

In carrying out the invention in practice, I proceed as follows to form a depolarizing element :-The protosulfid of copper hav- Specification of Letters Patent;

Patented'Apr. 18, 1916.

ing been obtained preferably in the manner above indicated, I break it into small pieces which I place in a cylinder of wire cloth (saycopper) disposed around a metallic rod (say copper) which forms the axisof the depolarizer. The cylindrical element thus-obtained will form a voltaic couple with zinc, having a concentrated solution of caustic soda as an electrolyte. The said couple has an E. M. F. of 0.7 volt and is almost unpolarizable;

lVhat I claim as my invention and desire to secure by Letters Patent is:

A depolarizer for batteries comprising artificial protosulfid of copper, and a container for said protosulfid of copper.

Signed at New York city, in the county of New York and State of New York this twenty-first day ofFebruary, A. D. 1916. FELIPPE SABOIA BANDEIRA DE MELLO. 

